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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 563 · 40 questions
TalentJR

How to do it in your head ((a + b)²): Split: 27 = 20 + 7. Find 20² = 400, 2 × 20 × 7 = 280 and 7² = 49. Add, biggest first: 400 + 280 + 49.

NameDateTime takenScore ___ / 40
  1. 1.23² =
  2. 2.29² =
  3. 3.21² =
  4. 4.17² =
  5. 5.18² =
  6. 6.28² =
  7. 7.12² =
  8. 8.11² =
  9. 9.22² =
  10. 10.27² =
  11. 11.25² =
  12. 12.24² =
  13. 13.26² =
  14. 14.13² =
  15. 15.16² =
  16. 16.15² =
  17. 17.14² =
  18. 18.17² =
  19. 19.19² =
  20. 20.16² =
  21. 21.21² =
  22. 22.11² =
  23. 23.16² =
  24. 24.21² =
  25. 25.22² =
  26. 26.11² =
  27. 27.29² =
  28. 28.14² =
  29. 29.26² =
  30. 30.14² =
  31. 31.15² =
  32. 32.23² =
  33. 33.16² =
  34. 34.24² =
  35. 35.15² =
  36. 36.26² =
  37. 37.13² =
  38. 38.22² =
  39. 39.11² =
  40. 40.28² =

Answer key

  1. 529
  2. 841
  3. 441
  4. 289
  5. 324
  6. 784
  7. 144
  8. 121
  9. 484
  10. 729
  11. 625
  12. 576
  13. 676
  14. 169
  15. 256
  16. 225
  17. 196
  18. 289
  19. 361
  20. 256
  21. 441
  22. 121
  23. 256
  24. 441
  25. 484
  26. 121
  27. 841
  28. 196
  29. 676
  30. 196
  31. 225
  32. 529
  33. 256
  34. 576
  35. 225
  36. 676
  37. 169
  38. 484
  39. 121
  40. 784

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